The Prognostic Role of Klotho in Patients with Chronic Kidney Disease: A Systematic Review and Meta-analysis
Table 2
NOS scores of the cohort studies included.
Cohort study
Selection representativeness of the exposed cohort
Selection of the unexposed cohort
Ascertainment of exposure
Outcome of interest not present at start of study
Comparability control for important factor or additional factor
Outcome assessment
Was follow-up long enough for outcomes to occur
Adequacy of follow-up of cohorts
Total quality scores
Liu 2018
/
★
★
★
★
★
/
★
6
Bob 2018
/
★
★
★
/
★
/
/
4
Fountoulakis 2018
/
★
★
★
★★
★
★
★
8
Qian 2018
/
★
★
★
★★
★
/
★
7
Drew 2017
★
★
★
★
★★
★
★
★
9
Kim 2016
/
★
★
★
★
★
★
★
7
Kim 2013
/
★
★
★
★★
★
★
★
8
Seiler 2012
/
★
★
★
★★
★
★
★
8
Note: 2 stars could be awarded for this item. Studies that controlled for age or eGFR were awarded one star, respectively. Abbreviation: NOS: Newcastle–Ottawa Scale.
